Pin functions determined by PROM?

[Bruce Plecan]

>From what I've seen yes.
Using man to auto, or visa versa is something to be avoided, IMHO
Grumpy


> Can a PROM change the function of the input pins on the ECM?  Last night
> I dropped in a PROM for a 3.1 auto into the 7730 for my 2.8 5spd, and I
> noticed a few odds things happening.  It seems that the VSS doesn't get
> to the ECM, causing stalling problems on coasting and DTC 24.  I can
> possibly understand this because the PROM was designed for an auto, but
> it also can't read the A/C pressure transducer, so no A/C demand nor
> clutch control, either.  I dunno how it would have handled the lack of a
> digital EGR, but since the VSS never made it above zero, I'm guessing
> that I would not have have found out.


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